ÃÛÑ¿´«Ã½

Available for over a year

The attacks happened just four days after a key suspect in last November's Paris attacks, Saleh Abdeslam, was detained in Brussels. His lawyer says he is co-operating with the authorities -- prompting suggestions that this morning's attacks were carried out either in revenge for his arrest, or by members of a cell anxious to act before they too were caught. Our security correspondent, Frank Gardner, examines the possible links between the Paris and Brussels attacks and why Belgium appears to be at the centre of European jihadism. (Photo: Belgian police at Maalbeek subway station in Brussels. Credit: AFP/Getty images)